Thanks for your post. I'm aware of Jindalee and the Russian OTHRs which claim to detect aircraft (and I believe the claim) but they are very different from WSPR.
My station transmits 10 watts (and that's on the high side for WSPR) into an omnidirectional wire antenna. Some WSPR stations use directional yagi antennas but that information isn't contained in the WSPR data. A WSPR transmission lasts around 1 minute 50 seconds but the frequency shift/signal strength is only calculated the once during that transmission (not sure if by averaging). A transmission has to start within a second of the start of an even minute. Some stations are GPS locked but I just click the PTT on my radio to start the transmission while looking at the time on my digital atomic receiver clock.
In answer to your questions some WSPR stations transmit every 2 minutes while others like mine only transmit once or twice an hour.
My station transmits 10 watts (and that's on the high side for WSPR) into an omnidirectional wire antenna. Some WSPR stations use directional yagi antennas but that information isn't contained in the WSPR data. A WSPR transmission lasts around 1 minute 50 seconds but the frequency shift/signal strength is only calculated the once during that transmission (not sure if by averaging). A transmission has to start within a second of the start of an even minute. Some stations are GPS locked but I just click the PTT on my radio to start the transmission while looking at the time on my digital atomic receiver clock.
In answer to your questions some WSPR stations transmit every 2 minutes while others like mine only transmit once or twice an hour.